During Immortal Emperor Bu Si generation, the Heavenvine Citadel became greedy. Sunflower Forefather and several other Ancestors tried to seize the essence of the Heaven's Will to forcefully create another Calabash, but it ended in tragedy. The Heavenly Tribulation punished the Heavenvine Treefather and left behind eternal wound.
The Heavenvine Calabash is a Longevity Medicine. Most likely it is very powerful, as even Li Qiye, who possessed many Immortal Medicines, needed it to complete the Life Replenishment of Peacock Treefather.